uxcell 12mm Linear Ball Bearings LMK12UU Extra Long Square Flange, 12mm Bore, 21mm OD, 57mm Length 2pcs;

Description:
-LMKLUU series Linear Ball Bearing Slide Block Units are complementary to linear ball bearings.
-They usually consist of a light-weight, aluminum housing to provide high strength and stiffness.
-Compact design with High load carrying capacity, Linear Motion Bearing Unit is a rolling friction supporting element that usually used for linear motion mechanical parts with small friction.
-Coordinate with Linear Motion Shaft, recirculating balls provide unlimited stroke at low friction movement, permit temperature within 80 degree Celsius.
-It is great for 3D printer, CNC, and other applications.

Specification:
Bearing No.: LMK12UU
Bearing Ball Material: Chromium Steel
Outer Shell Material: Chromium Steel
Cage Material: Nylon
Nominal Shaft Diameter (dr): 12mm
Outer Diameter (D): 21mm
Total Length (L): 57mm
Mounting Hole Dia.: 4.3 x 7.3mm / 0.17 x 0.29inch (d1*d2);
Pitch Circle Dia. (PCD): 32mm / 1.26inch
Flange Size: 33 x 33 x 6mm / 1.3 x 1.3 x 0.24inch (L*W*H)
Ball Circuit: 4
Static Load Capacity (Cor): 1.2kN
Dynamic Load Capacity (Cr): 0.657kN